However, he claimed on the ABC's 7.30 on Monday night that up to five of the Essendon coaching staff took supplements, and "a couple of them" were taking supplements that were outside the WADA drugs code. The coaches are not required to adhere to the WADA code.

And Dank claimed the Australian Crime Commission had told him he had done nothing wrong when they interviewed him.

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Dank hit back at claims he is a rogue scientist who has potentially placed Essendon in dire trouble with WADA and ASADA, saying his programme was in full consultation with many other at the club, including Hird.

"There were some times when a player would be with me in consultation or coach would be present so the coaches were well aware of what was happening," he told 7.30.

"There was a collective involvement. It wasn't just Steve Dank. There was certainly input from people outside myself. There was a very significant involvement from Dean Robinson as the high performance manager, there was detailed discussion with James Hird, there was detailed discussion with the club doctor (Bruce Reid)."

Dank said the players not only signed forms sating what they were taking, but that further discussion also took place.

"Often at early times particularly in the early we'd get them to reaffirm what they were taking and what they were doing. And so there was a lot of discussion with the players on that," he said.

Dank said he was surprised players had said they were unaware of what they were taking.

He said the players had intravenous injections for vitamin B and C, which were compliant with the WADA code.

He said there was no intravenous application of peptides.

Dank refused to go into the specifics of his programme but said that there could be up to four different peptides in the protein powders he was giving players.

"Within the protein powders themselves there could have been between three to four different peptides that were part of the ingredients. By definition a peptide is anything that strings more than two amino acids together so certainly a lot of these formulations would have had various peptides but all very, very legal and all within the constraints of WADA."

Dank said every supplement used on Essendon players was logged in a detailed electronic register kept on the club's intranet.

He said the coaches who took supplements were on a different programme.

"There were some differences in what we offered the coaches. Let's face it, the coaches themselves are not subjected to any WADA code.

"Off the top of my head, three, four or five were taking vitamin supplements, protein supplements, and were they taking supplements that are outside of the regulations. And again they are entitled to do so because they aren't playing.

"To be perfectly honest, a couple of coaches were using supplements that were a little but outside the WADA Code, but they were entitled to it and nothing illegal in those."